I guess that's just me believing that everything has a reasonable explanation to it, even if it's maladaptive or unwanted behavior. That's also probably me just wanting "things to make sense," which is just my personality. I think the correlation between difficulty showering and BP is an interesting one, and the fact that so many are clearly afflicted by it is significant enough to warrant investigation, at least in my opinion.

If I really sit here and think about the feelings around my personal resistance to showering, I attribute it to lack of motivation/energy caused by depression, which is biological. So my brain is basically convincing me that not expending the energy to shower outweighs the benefits of showering, and outweighs even the positive reaction I have after the shower. Not rational, but depression isn't rational. For me, that makes sense, and it's a reasonable explanation I can accept, but naturally it is different for everyone.

Of course, I'm not saying things always end up making sense, but I guess part of me believes that if I can't figure out the answer or just don't know, that there's someway to get the answer or someone who would know out there. I should also say I have a very strong leaning towards neurobiological explanations of psychological behavior, and find the term "mental illness" rather pejorative and stigmatizing, as it implies "it's all in one's mind." It's not. As you point out, we all have "sick brains." There are physical things happening up there responsible for all of our collective symptoms, behaviors, moods, emotions, whatever. One of them just happens to be aversions to showers for X reason. I find it both fascinating and comforting to know I'm not alone about something so random, yet so affecting, and all because of BP. That amazes me.